Download the complete twelve-page Tascam Series 40 catalog, c. 1984: DOWNLOAD: Tascam40series1984 Products covered, with extensive text, specs, and photos,…
Download the four-page c. 1979 Martin Electric Guitars catalog: DOWNLOAD: MartinElectricGuitars1979 Models covered, with text, specs, and photos, include: Martin…
The original Williamson hi-fi amplifier schematic as published in "Wireless World" magazine (UK) May 1947. The Williamson amplifier is…
Courtesy of PS dot com reader H. Layer come these images of his Magnecord SD-1 wire recorder. Magnecord ran a…
In several of my previous posts I have expressed my love for the humble Ribbon Microphone. Ribbon mics were invented…
Image Source (n.b.: clicking link will initiate PDF download) The Bottlehead Company is a long-running fixture of the DIY tube…
Despite the hectic nature of the holiday-season, I am inevitably able to produce one piece each year as a gift…
I was checking out this bro's blog (or bros' blog? lots of chick pics) recently and I came across an…
image source NOTE: the above unit eventually did sell on eBay for $35,000. See below for scan... Here's something that…
Above: The BRDCSTR, a two-stage vacuum-tube microphone preamp inspired by classic 1940s broadcast audio preamps. Single-ended design with a 6SJ7…